From what can be seen in the pics, the pickups look like the bottom flatwork is a slightly deeper triangular shape than standard and the wires red, white and blue and fairly thin? I've seen similar harnesses in late 70's Fresher Strats. I suspect they're OEM units, so probably not a manufacturer indicator, though. They're not the Maxon/Fujigen electronics you see in Grecos either way. Any more pics?